Improvement in air-cushion stop-cocks



UNIT D STATES PATENT OFFICE.

DANIEL A. ROBINSON, OF \VASHINGTON, DISTRICT OF COLUMBIA.

IMPROVEMENT IN AIRCUSHlON STOP-COCKS.

Specification forming part of Letters Patent No. 130,243, dated August6, 1872;

To all whom it may concern:

Be it known that I, DANIEL A. RonINsoN, of Washington, in the county ofWVa-shington and District of Columbia, have invented a new and valuableImprovement in Stop-O0cks; and I do hereby declare that the following isa full, clear, and exact description of the construction and operationof the same, reference being had to the annexed drawing making a part ofthis specification, and to the letters and figures of reference markedthereon.

Figure l of the drawing is a representation of a vertical section of myinvention. Fig. 2 is a vertical section of my invention. Fig. 3 is ahorizontal section of my invention. Fig. 4 is a perspective view of myinvention.

This invention has relation to stop-cocks; and it consists in providingthe plug with an air-chamber which shall communicate with I thewater-pipe when the water is turned off,

whereby it is designed to prevent the violent shock of the reaction ofthe head within the pipes.

the main channel 0 of the faucet in rear of the plug by a passage orpassages, c, which may be formed in the wall of the seat 0 or in theplug itself.

Usually it is proposed to arrange the passage 2 so that communicationwith the port E will be out OK when the water is turned on. When Intestimony that I claim the above I have hereunto subscribed my name inthe presence of two witnesses.

. DANIEL A. ROBINSON.

Witnesses:

Gno. UPHAM, D. D. KANE.

